CPC Subgroup
G11B 3/68 Record carriers
Full Title
Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor (G11B11/00, take precedence) > Record carriers
8 direct subcodes
Child Classifications
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- G11B 3/70 characterised by the selection of material or structure; Processes or apparatus specially adapted for manufacturing record carriers
- G11B 3/72 Groove formations, e.g. run-in groove, run-out groove
- G11B 3/78 Multiple-track arrangements
- G11B 3/80 incorporating subsidiary guide means for heads, other than modulated grooves; Part-formed unmodulated grooves for conversion into transducing grooves
- G11B 3/90 with means indicating prior or unauthorised use
Top Applicants
Top 10 applicants by patent filingsfor class G11, 2013–2023, worldwide · Source: EPO PATSTAT
- MICRON TECHNOLOGY US 12,397
- SAMSUNG ELECTRONICS COMPANY KR 12,238
- SK HYNIX KR 11,371
- TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 4,601
- INTEL CORPORATION US 3,874
- IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 3,866
- SANDISK TECHNOLOGIES US 3,151
- SK HYNIX 3,143
- SAMSUNG ELECTRONICS COMPANY 3,073
- WESTERN DIGITAL TECHNOLOGIES US 2,961